Which format to choose
Each format is good at something different:
- JPG: best for photos. Small files that every app, website and printer accepts. No transparency.
- PNG: lossless, with sharp edges and transparency. Best for logos, screenshots, text and graphics. Photos come out large.
- WebP: made for the web. Often smaller than JPG at similar quality, and supports transparency. All current browsers show it, but some older apps and editors still can't open it.
What happens to transparency
PNG and WebP can have see-through parts; JPG can't. When you convert a transparent PNG to JPG, the clear areas need a colour. This tool fills them with white by default, and you can pick any colour to match where the image will go. Without a fill, most tools turn transparent areas black.
Going the other way, from JPG to PNG, doesn't add transparency. The background stays as it was, it's just stored in a lossless file. To cut out a background you need an editor or a background remover.
Quality and file size
JPG and WebP have a quality setting. 85 to 92 looks like the original for most photos while keeping files small. Below about 60, you start to see blocky patches in skies and smooth areas.
PNG has no quality setting, because it doesn't throw anything away. That's why a photo saved as PNG is often three to five times bigger than the same photo as JPG, while a screenshot or logo can be smaller as PNG than as JPG.
Converting from JPG to PNG won't bring back detail the JPG already lost. It only stops any more being lost when you edit and save again.
Common reasons to convert
A website or form only accepts JPG. An image saved from a web page came down as WebP and won't open in your editor. A logo needs to be PNG to keep its transparent background. Or a folder of huge PNG screenshots needs to be smaller to email. All of these are a quick batch conversion here.
Your originals aren't changed. The converted copies drop hidden photo data (EXIF), such as camera details and location.
Frequently asked questions
How do I convert PNG to JPG?
Add your PNG files above, pick JPG and a quality, then download. Transparent areas are filled with white unless you choose another colour.
How do I convert WebP to PNG or JPG?
Add the WebP files and pick PNG or JPG. PNG keeps any transparency; JPG gives a smaller file that opens in every app.
Does converting PNG to JPG lose quality?
Slightly, because JPG is lossy. At 85 to 92% quality, photos look the same. Sharp text and logos can show faint blur, so keep those as PNG.
Why is my PNG bigger than the JPG?
PNG is lossless and stores every pixel exactly. That suits graphics, but for photos it makes much bigger files than JPG.
Can I convert many images at once?
Yes. Add as many as you like; they all use the same settings, and Download all saves them as one zip file.